如何阻止XCode重复出现和消失构建错误？

Very often, when I run my unit tests for my iPhone project, XCode feels like making the actual errors disappear from the errors and warnings group. These errors are often under the general sub-item of that group, and often when I need to read the text of the error in detail, all errors disappear and all I have left are the build warnings. Has anyone else seen this behavior and is there a way to fix it?Very often, when I run my unit tests for my iPh